Diplomats from more than 180 countries are meeting in Bonn over the next three days to reopen global climate change negotiations for the first time since last year's Copenhagen summit, which was widely perceived as a failure.

Some 110 countries have now backed the agreements made in the accord. These include aiming to hold temperature rises to 2C, transferring $30bn a year in the short term and $100bn a year by 2020 to developing countries for adaptation to climate change; and reaching new global agreements on forests and technology transfer.

Observers this morning said they detected a new mood to cooperate in the talks, with developing countries determined to find a way through the suspicion, mistrust and national self-interest which hampered the Copenhagen summit.

But many diplomats also expect fireworks, especially from some African countries which felt left out of the Copenhagen talks.

"There is still considerable anger that a figure of 2C was reached which, if implemented, would effectively consign many vulnerable countries to an intolerable future," said a spokesman for the least developed group of countries.

Critically, countries have agreed to negotiate along two tracks, as opposed to the one which the US, EU and other rich countries sought before Bonn.

However, it is uncertain how far the text of the accord will be used as the base for future negotiations. The US has signalled its determination to follow it but other developed countries are expected to be less enthusiastic. Many of the poorest countries are hostile, and key emerging economies like China and India have signalled reluctant support.

Over the next few days, negotiators - and not politicians - will try to hammer out the technical details of a future agreement and chart a way ahead for the politicians to take over at meetings in Bonn in May and in Cancun, Mexico in November.

Non-governmental groups today urged countries to heal the rifts between them. "Governments have a critical chance to repair the distrust caused by their failure to take the lead in Copenhagen," said Wendel Trio, Greenpeace international climate policy spokesman.

"Delay is costly both financially and in terms of human lives. Governments must adopt an ambitious plan of action demonstrating they are prepared to move beyond a time-wasting blame game, and negotiating solutions to the climate crisis," he said.

Governments must acknowledge there is a considerable gap between proposed emission reduction pledges," said a WWF spokesman.